
.focus_box { position: relative; width: 90%; height: 60%; margin: 10.5% auto; overflow: hidden; }
.focus_box .focus_bd { position: absolute; }
.focus_box .focus_btn li { float: left; width: 18px; display: inline; height: 18px; padding: 0; border: 0 none; background: #000; line-height: 18px; text-align: center; font-weight: bold; color: #999; margin-right: 5px; cursor: pointer; }
.focus_box .focus_bd { top: 0; left: 0; }
.focus_box .focus_bd li { float: left; display: inline; overflow: hidden; }
.focus_box .focus_bd img { display: block;}
.focus_box .btn_prev,
.focus_box .btn_next { position: absolute; width: 10%; height: 10%; line-height: 40px; background-color: rgba(0,0,0,0.5);top:50%; margin-top: -20px; color: #fff; font-size: 30px; text-align: center; font-family: Arial; text-decoration: none;}
.focus_box .btn_prev { left: 0;}
.focus_box .btn_next { right: 0;}
